The Peterbilt Oval Logo Air Valve Knob is a practical and reliable product designed for easy installation and use. Made of durable aluminum and treated with industrial hard chrome, this knob is built to last. It is available in both octagon and square shapes, allowing for a perfect fit on most makes and models. With the iconic Peterbilt Oval Logo, this replacement knob adds a touch of style to your vehicle's interior. Sold individually, this air valve knob is a convenient and cost-effective solution for enhancing your driving experience.